[sdiy] Low Frequency Square to Sine Waveshaper

[Magnus Danielson]

From: Florian Anwander <Florian.Anwander at consol.de>
Subject: Re: [sdiy] Low Frequency Square to Sine Waveshaper
Date: Mon, 26 May 2008 11:55:53 +0200
Message-ID: <483A8929.5090303 at consol.de>

> Hi Magnus,
> 
> > both sources to the square and sine-waves. However, to create a sine-wave you
> > weight together 5 squares (the fundamental and four overtones) with resistors
> > and then put a capacitor to ground (or over the negative feedback of a
> > buffering op-amp) on the output for final rounding off effect. 
> 
> If the master clock oscillator of this kind of LFO is voltage controlled, it would make sense to use also a VC slew limiter. If the oscillator speed is controlled only by an pot, then use a dual pot where the second pot is used to control the slew rate.

Well, if you have multiple outputs, VC-slew is the way to go. However, if you
don't move around tooo much, a fix filter frequency will work pretty well as it
is only a minor distorsion and higher upp.

Cheers,
Magnus